Means for attaching garnett teeth to cylinders



Jan. 29, 1929.

T. W. ALLEN MEANS FOR 'ATTACHING GARNETT TEETH TO CYLINDERS Filed 001;. 27, 1927 Patented Jan. 2 9, 1929.

UNITED stares moan [Parent emaca THOMAS w. ALLEN, P PHILADELPHIA, PENNSYLVANIA, AssIeNoR iro Pnoo'roia a scnwanrz, INconPonA En, 0P PHILADELPHIA, PEN sYLvANIA, A CORPORATION OF PENNSYLVANIA.

MEANS FOR APTACHING GABNETT TEETH 'Po' CYLINDERS;

Application filed. October 27, 1927. Serial No. 229,176.

The object of my invention is to provide means for securing garnett toothed strips to a cylinder by a separate strip having retain ing means which overlaps the toothed strip. 5 A further object of the invention is to provide the retaining strip with a spring retainer, which will allow the tooth to be forced into position past'the spring-retaining member, which in turn will hold the toothed strip in position when seated in the groove of the cylinder.

In the accompanying drawing: w Fig. 1 is a sectionalview of a cylinder of a- Garnett machine, illustrating the improved means for retaining the toothed strip on the cylinder;

Fig.2 is a sectional view showing the toothed strip beingforced into position;

Fig. 3 is a sectional perspective view of a portion of a toothed strip;

Fig. 4 is a sectional perspective view of a portion of the retaining strip;

Figs. 5, 6, .7 and 8 are views illustrating modifications of the invention.

Referring to Fig. 1, 1 is a cylinder having a spiral groove 2 of the ordinary form cut therein. The convolutions of the groove are spaced apart sufliciently to form a base 4 for the toothed strip 3, which is'wound spirally upon the cylinder. The toothed strip, in the present instance, has a base 5, and projecting from the base are'garnett teeth 6 of any suitable form. The teeth are narrower than .the

base so as to form a shoulder 7 at one side.

This shoulder is preferably beveled as shown in the drawings. v

Located in the spiral groove 2 is a retaining strip 8 having a base 9 and a spring-retaining member 10. This retaining member 40 is made as clearly shown in Figs. 1 and 4, and

is so proportioned that it will yield when the toothed strip is forced into the space between the two convolutions of the retaining strip as clearly shown in Fig. 2, and when the toothed strip has been seated on the cylinder then the spring member of the retaining strip will spring into normal position over the shoulder 7 of the toothed strip, as shown in Fig. 1, re-

taining said strip in position on the cylinder,

1 ing strip the convolutions of the retaining strip holding the toothed strip laterally in position. By this means the retaining strip can be wound upon the cylinder, and then the toothed strip as it is wound upon the cylinder will be forced past the spring member of the retaining strip, as clearly shown in the drawings.

While Fig. 1 illustrates the retaining member as projecting upwards from the centre of the retaining strip, Fig. 5' illustrates the spring member 1O projecting fromone edge of the strip 8*, providing alongspring tongue. r

Fig. 6 illustrates a retaining strip 8 having a longitudinal slot 11 therein, forming a solid abutment 12 for a toothed strip and a I spring member 10*.

In Fig. 7 the toothed strip 3 has two shoulders, 7 and 7 the shoulders 7 being at one side of the toothed strip, and the shoulders 7* being atthe opposite side. In

this instance, the retaining member 8 has a longitudinal slot 13 therein, separating two I yielding sections or tongues 10 and 10 one spring tongue engaging the shoulders 7 a and the other the shoulder 7".

In Fig. 8 is shown a retaining strip made in two parts, a base 9 and a spring member 10 secured in a stop in the base.

Other forms of retaining members maybe made without departing from the essential so features of the invention.

While the invention is particularly adapted for retaining garnett toothed strips on cylinders, it can be used for retaining other forms of toothed strips on cylinders.

I claim p I I 1. The combination of a cylinder; a retain thereon having a spring member; and a toothed strip shaped to be engaged by said spring member when in position.

2. The combination of a cylinder having a spiral groove therein; a retaining strip located in the groove and extending beyond the periphery of the cylinder to a spiral groove a toothed strip located tending over the shoulder when in its normal position and acting to retain the toothed strip on the cylinder.

3.. The combination of a cylinder having a 5 spiral groove therein; a retaining member located in the groove and having a bent spring section extending at one side beyond the edge of the base of said member; a toothed strip located between the convolutions of the retraining member and having a shoulder at 10 one side, the shoulder being beveled so as to allow the spring section of the retaining strip to seat itself on the shoulder when the toothed strip is seated.

THOMAS W. ALLEN. 

